Weisco Piston Clearance Recommendation

[supraguy31]

Ok so my current supra build did 663rwhp on the Dyno and with my last pull blew a few Ringlands on my stock Pistons. Always wanted to see how far I can push them and I found out. So I bought a set of Weisco pistons which are Higher compression than stock Pistons. So I have 2 Questions here.

1. Since the compression ratio of there Pistons are 9:1 when should I be safe saying that I need a 2mm MHG to compensate?
2. Weisco Recommended Clearance is .0025, Since Im running alot higher HP numbers, would you all recommend going a little bigger on the clearance (ie .003) or would there be a problem staying at the recommended Clearance.

Thanks
Robert

 

[Dan_Gyoba]

Stay at the recommended clearance.

A thicker HG will make some difference in compression ratio, but without knowing what's been milled from your block and head, it's not possible to calculate your final static compression ratio.

 

[supraguy31]

.10 off the block and basically had the head cleaned. Thinking about getting another block and just have the RA cut. other than that nothing else.

 

[adampecush]

.10 as in 10 thou or 0.10 inches (100 thou!)?

 

[Dan_Gyoba]

Or... 0.10mm, as in 0.004"

 

[supraguy31]

10 thousandths. Basically cleaned the block up and did a radius or RA of 30.